| 1 | /* YACC parser for Java expressions, for GDB. |
| 2 | Copyright 1997, 1998, 1999, 2000 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | /* Parse a Java expression from text in a string, |
| 22 | and return the result as a struct expression pointer. |
| 23 | That structure contains arithmetic operations in reverse polish, |
| 24 | with constants represented by operations that are followed by special data. |
| 25 | See expression.h for the details of the format. |
| 26 | What is important here is that it can be built up sequentially |
| 27 | during the process of parsing; the lower levels of the tree always |
| 28 | come first in the result. Well, almost always; see ArrayAccess. |
| 29 | |
| 30 | Note that malloc's and realloc's in this file are transformed to |
| 31 | xmalloc and xrealloc respectively by the same sed command in the |
| 32 | makefile that remaps any other malloc/realloc inserted by the parser |
| 33 | generator. Doing this with #defines and trying to control the interaction |
| 34 | with include files (<malloc.h> and <stdlib.h> for example) just became |
| 35 | too messy, particularly when such includes can be inserted at random |
| 36 | times by the parser generator. */ |
| 37 | |
| 38 | %{ |
| 39 | |
| 40 | #include "defs.h" |
| 41 | #include "gdb_string.h" |
| 42 | #include <ctype.h> |
| 43 | #include "expression.h" |
| 44 | #include "value.h" |
| 45 | #include "parser-defs.h" |
| 46 | #include "language.h" |
| 47 | #include "jv-lang.h" |
| 48 | #include "bfd.h" /* Required by objfiles.h. */ |
| 49 | #include "symfile.h" /* Required by objfiles.h. */ |
| 50 | #include "objfiles.h" /* For have_full_symbols and have_partial_symbols */ |
| 51 | |
| 52 | /* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc), |
| 53 | as well as gratuitiously global symbol names, so we can have multiple |
| 54 | yacc generated parsers in gdb. Note that these are only the variables |
| 55 | produced by yacc. If other parser generators (bison, byacc, etc) produce |
| 56 | additional global names that conflict at link time, then those parser |
| 57 | generators need to be fixed instead of adding those names to this list. */ |
| 58 | |
| 59 | #define yymaxdepth java_maxdepth |
| 60 | #define yyparse java_parse |
| 61 | #define yylex java_lex |
| 62 | #define yyerror java_error |
| 63 | #define yylval java_lval |
| 64 | #define yychar java_char |
| 65 | #define yydebug java_debug |
| 66 | #define yypact java_pact |
| 67 | #define yyr1 java_r1 |
| 68 | #define yyr2 java_r2 |
| 69 | #define yydef java_def |
| 70 | #define yychk java_chk |
| 71 | #define yypgo java_pgo |
| 72 | #define yyact java_act |
| 73 | #define yyexca java_exca |
| 74 | #define yyerrflag java_errflag |
| 75 | #define yynerrs java_nerrs |
| 76 | #define yyps java_ps |
| 77 | #define yypv java_pv |
| 78 | #define yys java_s |
| 79 | #define yy_yys java_yys |
| 80 | #define yystate java_state |
| 81 | #define yytmp java_tmp |
| 82 | #define yyv java_v |
| 83 | #define yy_yyv java_yyv |
| 84 | #define yyval java_val |
| 85 | #define yylloc java_lloc |
| 86 | #define yyreds java_reds /* With YYDEBUG defined */ |
| 87 | #define yytoks java_toks /* With YYDEBUG defined */ |
| 88 | #define yylhs java_yylhs |
| 89 | #define yylen java_yylen |
| 90 | #define yydefred java_yydefred |
| 91 | #define yydgoto java_yydgoto |
| 92 | #define yysindex java_yysindex |
| 93 | #define yyrindex java_yyrindex |
| 94 | #define yygindex java_yygindex |
| 95 | #define yytable java_yytable |
| 96 | #define yycheck java_yycheck |
| 97 | |
| 98 | #ifndef YYDEBUG |
| 99 | #define YYDEBUG 0 /* Default to no yydebug support */ |
| 100 | #endif |
| 101 | |
| 102 | int yyparse (void); |
| 103 | |
| 104 | static int yylex (void); |
| 105 | |
| 106 | void yyerror (char *); |
| 107 | |
| 108 | static struct type *java_type_from_name (struct stoken); |
| 109 | static void push_expression_name (struct stoken); |
| 110 | static void push_fieldnames (struct stoken); |
| 111 | |
| 112 | static struct expression *copy_exp (struct expression *, int); |
| 113 | static void insert_exp (int, struct expression *); |
| 114 | |
| 115 | %} |
| 116 | |
| 117 | /* Although the yacc "value" of an expression is not used, |
| 118 | since the result is stored in the structure being created, |
| 119 | other node types do have values. */ |
| 120 | |
| 121 | %union |
| 122 | { |
| 123 | LONGEST lval; |
| 124 | struct { |
| 125 | LONGEST val; |
| 126 | struct type *type; |
| 127 | } typed_val_int; |
| 128 | struct { |
| 129 | DOUBLEST dval; |
| 130 | struct type *type; |
| 131 | } typed_val_float; |
| 132 | struct symbol *sym; |
| 133 | struct type *tval; |
| 134 | struct stoken sval; |
| 135 | struct ttype tsym; |
| 136 | struct symtoken ssym; |
| 137 | struct block *bval; |
| 138 | enum exp_opcode opcode; |
| 139 | struct internalvar *ivar; |
| 140 | int *ivec; |
| 141 | } |
| 142 | |
| 143 | %{ |
| 144 | /* YYSTYPE gets defined by %union */ |
| 145 | static int parse_number (char *, int, int, YYSTYPE *); |
| 146 | %} |
| 147 | |
| 148 | %type <lval> rcurly Dims Dims_opt |
| 149 | %type <tval> ClassOrInterfaceType ClassType /* ReferenceType Type ArrayType */ |
| 150 | %type <tval> IntegralType FloatingPointType NumericType PrimitiveType ArrayType PrimitiveOrArrayType |
| 151 | |
| 152 | %token <typed_val_int> INTEGER_LITERAL |
| 153 | %token <typed_val_float> FLOATING_POINT_LITERAL |
| 154 | |
| 155 | %token <sval> IDENTIFIER |
| 156 | %token <sval> STRING_LITERAL |
| 157 | %token <lval> BOOLEAN_LITERAL |
| 158 | %token <tsym> TYPENAME |
| 159 | %type <sval> Name SimpleName QualifiedName ForcedName |
| 160 | |
| 161 | /* A NAME_OR_INT is a symbol which is not known in the symbol table, |
| 162 | but which would parse as a valid number in the current input radix. |
| 163 | E.g. "c" when input_radix==16. Depending on the parse, it will be |
| 164 | turned into a name or into a number. */ |
| 165 | |
| 166 | %token <sval> NAME_OR_INT |
| 167 | |
| 168 | %token ERROR |
| 169 | |
| 170 | /* Special type cases, put in to allow the parser to distinguish different |
| 171 | legal basetypes. */ |
| 172 | %token LONG SHORT BYTE INT CHAR BOOLEAN DOUBLE FLOAT |
| 173 | |
| 174 | %token VARIABLE |
| 175 | |
| 176 | %token <opcode> ASSIGN_MODIFY |
| 177 | |
| 178 | %token THIS SUPER NEW |
| 179 | |
| 180 | %left ',' |
| 181 | %right '=' ASSIGN_MODIFY |
| 182 | %right '?' |
| 183 | %left OROR |
| 184 | %left ANDAND |
| 185 | %left '|' |
| 186 | %left '^' |
| 187 | %left '&' |
| 188 | %left EQUAL NOTEQUAL |
| 189 | %left '<' '>' LEQ GEQ |
| 190 | %left LSH RSH |
| 191 | %left '+' '-' |
| 192 | %left '*' '/' '%' |
| 193 | %right INCREMENT DECREMENT |
| 194 | %right '.' '[' '(' |
| 195 | |
| 196 | \f |
| 197 | %% |
| 198 | |
| 199 | start : exp1 |
| 200 | | type_exp |
| 201 | ; |
| 202 | |
| 203 | type_exp: PrimitiveOrArrayType |
| 204 | { |
| 205 | write_exp_elt_opcode(OP_TYPE); |
| 206 | write_exp_elt_type($1); |
| 207 | write_exp_elt_opcode(OP_TYPE); |
| 208 | } |
| 209 | ; |
| 210 | |
| 211 | PrimitiveOrArrayType: |
| 212 | PrimitiveType |
| 213 | | ArrayType |
| 214 | ; |
| 215 | |
| 216 | StringLiteral: |
| 217 | STRING_LITERAL |
| 218 | { |
| 219 | write_exp_elt_opcode (OP_STRING); |
| 220 | write_exp_string ($1); |
| 221 | write_exp_elt_opcode (OP_STRING); |
| 222 | } |
| 223 | ; |
| 224 | |
| 225 | Literal: |
| 226 | INTEGER_LITERAL |
| 227 | { write_exp_elt_opcode (OP_LONG); |
| 228 | write_exp_elt_type ($1.type); |
| 229 | write_exp_elt_longcst ((LONGEST)($1.val)); |
| 230 | write_exp_elt_opcode (OP_LONG); } |
| 231 | | NAME_OR_INT |
| 232 | { YYSTYPE val; |
| 233 | parse_number ($1.ptr, $1.length, 0, &val); |
| 234 | write_exp_elt_opcode (OP_LONG); |
| 235 | write_exp_elt_type (val.typed_val_int.type); |
| 236 | write_exp_elt_longcst ((LONGEST)val.typed_val_int.val); |
| 237 | write_exp_elt_opcode (OP_LONG); |
| 238 | } |
| 239 | | FLOATING_POINT_LITERAL |
| 240 | { write_exp_elt_opcode (OP_DOUBLE); |
| 241 | write_exp_elt_type ($1.type); |
| 242 | write_exp_elt_dblcst ($1.dval); |
| 243 | write_exp_elt_opcode (OP_DOUBLE); } |
| 244 | | BOOLEAN_LITERAL |
| 245 | { write_exp_elt_opcode (OP_LONG); |
| 246 | write_exp_elt_type (java_boolean_type); |
| 247 | write_exp_elt_longcst ((LONGEST)$1); |
| 248 | write_exp_elt_opcode (OP_LONG); } |
| 249 | | StringLiteral |
| 250 | ; |
| 251 | |
| 252 | /* UNUSED: |
| 253 | Type: |
| 254 | PrimitiveType |
| 255 | | ReferenceType |
| 256 | ; |
| 257 | */ |
| 258 | |
| 259 | PrimitiveType: |
| 260 | NumericType |
| 261 | | BOOLEAN |
| 262 | { $$ = java_boolean_type; } |
| 263 | ; |
| 264 | |
| 265 | NumericType: |
| 266 | IntegralType |
| 267 | | FloatingPointType |
| 268 | ; |
| 269 | |
| 270 | IntegralType: |
| 271 | BYTE |
| 272 | { $$ = java_byte_type; } |
| 273 | | SHORT |
| 274 | { $$ = java_short_type; } |
| 275 | | INT |
| 276 | { $$ = java_int_type; } |
| 277 | | LONG |
| 278 | { $$ = java_long_type; } |
| 279 | | CHAR |
| 280 | { $$ = java_char_type; } |
| 281 | ; |
| 282 | |
| 283 | FloatingPointType: |
| 284 | FLOAT |
| 285 | { $$ = java_float_type; } |
| 286 | | DOUBLE |
| 287 | { $$ = java_double_type; } |
| 288 | ; |
| 289 | |
| 290 | /* UNUSED: |
| 291 | ReferenceType: |
| 292 | ClassOrInterfaceType |
| 293 | | ArrayType |
| 294 | ; |
| 295 | */ |
| 296 | |
| 297 | ClassOrInterfaceType: |
| 298 | Name |
| 299 | { $$ = java_type_from_name ($1); } |
| 300 | ; |
| 301 | |
| 302 | ClassType: |
| 303 | ClassOrInterfaceType |
| 304 | ; |
| 305 | |
| 306 | ArrayType: |
| 307 | PrimitiveType Dims |
| 308 | { $$ = java_array_type ($1, $2); } |
| 309 | | Name Dims |
| 310 | { $$ = java_array_type (java_type_from_name ($1), $2); } |
| 311 | ; |
| 312 | |
| 313 | Name: |
| 314 | IDENTIFIER |
| 315 | | QualifiedName |
| 316 | ; |
| 317 | |
| 318 | ForcedName: |
| 319 | SimpleName |
| 320 | | QualifiedName |
| 321 | ; |
| 322 | |
| 323 | SimpleName: |
| 324 | IDENTIFIER |
| 325 | | NAME_OR_INT |
| 326 | ; |
| 327 | |
| 328 | QualifiedName: |
| 329 | Name '.' SimpleName |
| 330 | { $$.length = $1.length + $3.length + 1; |
| 331 | if ($1.ptr + $1.length + 1 == $3.ptr |
| 332 | && $1.ptr[$1.length] == '.') |
| 333 | $$.ptr = $1.ptr; /* Optimization. */ |
| 334 | else |
| 335 | { |
| 336 | $$.ptr = (char *) malloc ($$.length + 1); |
| 337 | make_cleanup (free, $$.ptr); |
| 338 | sprintf ($$.ptr, "%.*s.%.*s", |
| 339 | $1.length, $1.ptr, $3.length, $3.ptr); |
| 340 | } } |
| 341 | ; |
| 342 | |
| 343 | /* |
| 344 | type_exp: type |
| 345 | { write_exp_elt_opcode(OP_TYPE); |
| 346 | write_exp_elt_type($1); |
| 347 | write_exp_elt_opcode(OP_TYPE);} |
| 348 | ; |
| 349 | */ |
| 350 | |
| 351 | /* Expressions, including the comma operator. */ |
| 352 | exp1 : Expression |
| 353 | | exp1 ',' Expression |
| 354 | { write_exp_elt_opcode (BINOP_COMMA); } |
| 355 | ; |
| 356 | |
| 357 | Primary: |
| 358 | PrimaryNoNewArray |
| 359 | | ArrayCreationExpression |
| 360 | ; |
| 361 | |
| 362 | PrimaryNoNewArray: |
| 363 | Literal |
| 364 | | THIS |
| 365 | { write_exp_elt_opcode (OP_THIS); |
| 366 | write_exp_elt_opcode (OP_THIS); } |
| 367 | | '(' Expression ')' |
| 368 | | ClassInstanceCreationExpression |
| 369 | | FieldAccess |
| 370 | | MethodInvocation |
| 371 | | ArrayAccess |
| 372 | | lcurly ArgumentList rcurly |
| 373 | { write_exp_elt_opcode (OP_ARRAY); |
| 374 | write_exp_elt_longcst ((LONGEST) 0); |
| 375 | write_exp_elt_longcst ((LONGEST) $3); |
| 376 | write_exp_elt_opcode (OP_ARRAY); } |
| 377 | ; |
| 378 | |
| 379 | lcurly: |
| 380 | '{' |
| 381 | { start_arglist (); } |
| 382 | ; |
| 383 | |
| 384 | rcurly: |
| 385 | '}' |
| 386 | { $$ = end_arglist () - 1; } |
| 387 | ; |
| 388 | |
| 389 | ClassInstanceCreationExpression: |
| 390 | NEW ClassType '(' ArgumentList_opt ')' |
| 391 | { error ("FIXME - ClassInstanceCreationExpression"); } |
| 392 | ; |
| 393 | |
| 394 | ArgumentList: |
| 395 | Expression |
| 396 | { arglist_len = 1; } |
| 397 | | ArgumentList ',' Expression |
| 398 | { arglist_len++; } |
| 399 | ; |
| 400 | |
| 401 | ArgumentList_opt: |
| 402 | /* EMPTY */ |
| 403 | { arglist_len = 0; } |
| 404 | | ArgumentList |
| 405 | ; |
| 406 | |
| 407 | ArrayCreationExpression: |
| 408 | NEW PrimitiveType DimExprs Dims_opt |
| 409 | { error ("FIXME - ArrayCreatiionExpression"); } |
| 410 | | NEW ClassOrInterfaceType DimExprs Dims_opt |
| 411 | { error ("FIXME - ArrayCreatiionExpression"); } |
| 412 | ; |
| 413 | |
| 414 | DimExprs: |
| 415 | DimExpr |
| 416 | | DimExprs DimExpr |
| 417 | ; |
| 418 | |
| 419 | DimExpr: |
| 420 | '[' Expression ']' |
| 421 | ; |
| 422 | |
| 423 | Dims: |
| 424 | '[' ']' |
| 425 | { $$ = 1; } |
| 426 | | Dims '[' ']' |
| 427 | { $$ = $1 + 1; } |
| 428 | ; |
| 429 | |
| 430 | Dims_opt: |
| 431 | Dims |
| 432 | | /* EMPTY */ |
| 433 | { $$ = 0; } |
| 434 | ; |
| 435 | |
| 436 | FieldAccess: |
| 437 | Primary '.' SimpleName |
| 438 | { push_fieldnames ($3); } |
| 439 | | VARIABLE '.' SimpleName |
| 440 | { push_fieldnames ($3); } |
| 441 | /*| SUPER '.' SimpleName { FIXME } */ |
| 442 | ; |
| 443 | |
| 444 | MethodInvocation: |
| 445 | Name '(' ArgumentList_opt ')' |
| 446 | { error ("method invocation not implemented"); } |
| 447 | | Primary '.' SimpleName '(' ArgumentList_opt ')' |
| 448 | { error ("method invocation not implemented"); } |
| 449 | | SUPER '.' SimpleName '(' ArgumentList_opt ')' |
| 450 | { error ("method invocation not implemented"); } |
| 451 | ; |
| 452 | |
| 453 | ArrayAccess: |
| 454 | Name '[' Expression ']' |
| 455 | { |
| 456 | /* Emit code for the Name now, then exchange it in the |
| 457 | expout array with the Expression's code. We could |
| 458 | introduce a OP_SWAP code or a reversed version of |
| 459 | BINOP_SUBSCRIPT, but that makes the rest of GDB pay |
| 460 | for our parsing kludges. */ |
| 461 | struct expression *name_expr; |
| 462 | |
| 463 | push_expression_name ($1); |
| 464 | name_expr = copy_exp (expout, expout_ptr); |
| 465 | expout_ptr -= name_expr->nelts; |
| 466 | insert_exp (expout_ptr-length_of_subexp (expout, expout_ptr), |
| 467 | name_expr); |
| 468 | free (name_expr); |
| 469 | write_exp_elt_opcode (BINOP_SUBSCRIPT); |
| 470 | } |
| 471 | | VARIABLE '[' Expression ']' |
| 472 | { write_exp_elt_opcode (BINOP_SUBSCRIPT); } |
| 473 | | PrimaryNoNewArray '[' Expression ']' |
| 474 | { write_exp_elt_opcode (BINOP_SUBSCRIPT); } |
| 475 | ; |
| 476 | |
| 477 | PostfixExpression: |
| 478 | Primary |
| 479 | | Name |
| 480 | { push_expression_name ($1); } |
| 481 | | VARIABLE |
| 482 | /* Already written by write_dollar_variable. */ |
| 483 | | PostIncrementExpression |
| 484 | | PostDecrementExpression |
| 485 | ; |
| 486 | |
| 487 | PostIncrementExpression: |
| 488 | PostfixExpression INCREMENT |
| 489 | { write_exp_elt_opcode (UNOP_POSTINCREMENT); } |
| 490 | ; |
| 491 | |
| 492 | PostDecrementExpression: |
| 493 | PostfixExpression DECREMENT |
| 494 | { write_exp_elt_opcode (UNOP_POSTDECREMENT); } |
| 495 | ; |
| 496 | |
| 497 | UnaryExpression: |
| 498 | PreIncrementExpression |
| 499 | | PreDecrementExpression |
| 500 | | '+' UnaryExpression |
| 501 | | '-' UnaryExpression |
| 502 | { write_exp_elt_opcode (UNOP_NEG); } |
| 503 | | '*' UnaryExpression |
| 504 | { write_exp_elt_opcode (UNOP_IND); } /*FIXME not in Java */ |
| 505 | | UnaryExpressionNotPlusMinus |
| 506 | ; |
| 507 | |
| 508 | PreIncrementExpression: |
| 509 | INCREMENT UnaryExpression |
| 510 | { write_exp_elt_opcode (UNOP_PREINCREMENT); } |
| 511 | ; |
| 512 | |
| 513 | PreDecrementExpression: |
| 514 | DECREMENT UnaryExpression |
| 515 | { write_exp_elt_opcode (UNOP_PREDECREMENT); } |
| 516 | ; |
| 517 | |
| 518 | UnaryExpressionNotPlusMinus: |
| 519 | PostfixExpression |
| 520 | | '~' UnaryExpression |
| 521 | { write_exp_elt_opcode (UNOP_COMPLEMENT); } |
| 522 | | '!' UnaryExpression |
| 523 | { write_exp_elt_opcode (UNOP_LOGICAL_NOT); } |
| 524 | | CastExpression |
| 525 | ; |
| 526 | |
| 527 | CastExpression: |
| 528 | '(' PrimitiveType Dims_opt ')' UnaryExpression |
| 529 | { write_exp_elt_opcode (UNOP_CAST); |
| 530 | write_exp_elt_type (java_array_type ($2, $3)); |
| 531 | write_exp_elt_opcode (UNOP_CAST); } |
| 532 | | '(' Expression ')' UnaryExpressionNotPlusMinus |
| 533 | { |
| 534 | int exp_size = expout_ptr; |
| 535 | int last_exp_size = length_of_subexp(expout, expout_ptr); |
| 536 | struct type *type; |
| 537 | int i; |
| 538 | int base = expout_ptr - last_exp_size - 3; |
| 539 | if (base < 0 || expout->elts[base+2].opcode != OP_TYPE) |
| 540 | error ("invalid cast expression"); |
| 541 | type = expout->elts[base+1].type; |
| 542 | /* Remove the 'Expression' and slide the |
| 543 | UnaryExpressionNotPlusMinus down to replace it. */ |
| 544 | for (i = 0; i < last_exp_size; i++) |
| 545 | expout->elts[base + i] = expout->elts[base + i + 3]; |
| 546 | expout_ptr -= 3; |
| 547 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
| 548 | type = lookup_pointer_type (type); |
| 549 | write_exp_elt_opcode (UNOP_CAST); |
| 550 | write_exp_elt_type (type); |
| 551 | write_exp_elt_opcode (UNOP_CAST); |
| 552 | } |
| 553 | | '(' Name Dims ')' UnaryExpressionNotPlusMinus |
| 554 | { write_exp_elt_opcode (UNOP_CAST); |
| 555 | write_exp_elt_type (java_array_type (java_type_from_name ($2), $3)); |
| 556 | write_exp_elt_opcode (UNOP_CAST); } |
| 557 | ; |
| 558 | |
| 559 | |
| 560 | MultiplicativeExpression: |
| 561 | UnaryExpression |
| 562 | | MultiplicativeExpression '*' UnaryExpression |
| 563 | { write_exp_elt_opcode (BINOP_MUL); } |
| 564 | | MultiplicativeExpression '/' UnaryExpression |
| 565 | { write_exp_elt_opcode (BINOP_DIV); } |
| 566 | | MultiplicativeExpression '%' UnaryExpression |
| 567 | { write_exp_elt_opcode (BINOP_REM); } |
| 568 | ; |
| 569 | |
| 570 | AdditiveExpression: |
| 571 | MultiplicativeExpression |
| 572 | | AdditiveExpression '+' MultiplicativeExpression |
| 573 | { write_exp_elt_opcode (BINOP_ADD); } |
| 574 | | AdditiveExpression '-' MultiplicativeExpression |
| 575 | { write_exp_elt_opcode (BINOP_SUB); } |
| 576 | ; |
| 577 | |
| 578 | ShiftExpression: |
| 579 | AdditiveExpression |
| 580 | | ShiftExpression LSH AdditiveExpression |
| 581 | { write_exp_elt_opcode (BINOP_LSH); } |
| 582 | | ShiftExpression RSH AdditiveExpression |
| 583 | { write_exp_elt_opcode (BINOP_RSH); } |
| 584 | /* | ShiftExpression >>> AdditiveExpression { FIXME } */ |
| 585 | ; |
| 586 | |
| 587 | RelationalExpression: |
| 588 | ShiftExpression |
| 589 | | RelationalExpression '<' ShiftExpression |
| 590 | { write_exp_elt_opcode (BINOP_LESS); } |
| 591 | | RelationalExpression '>' ShiftExpression |
| 592 | { write_exp_elt_opcode (BINOP_GTR); } |
| 593 | | RelationalExpression LEQ ShiftExpression |
| 594 | { write_exp_elt_opcode (BINOP_LEQ); } |
| 595 | | RelationalExpression GEQ ShiftExpression |
| 596 | { write_exp_elt_opcode (BINOP_GEQ); } |
| 597 | /* | RelationalExpresion INSTANCEOF ReferenceType { FIXME } */ |
| 598 | ; |
| 599 | |
| 600 | EqualityExpression: |
| 601 | RelationalExpression |
| 602 | | EqualityExpression EQUAL RelationalExpression |
| 603 | { write_exp_elt_opcode (BINOP_EQUAL); } |
| 604 | | EqualityExpression NOTEQUAL RelationalExpression |
| 605 | { write_exp_elt_opcode (BINOP_NOTEQUAL); } |
| 606 | ; |
| 607 | |
| 608 | AndExpression: |
| 609 | EqualityExpression |
| 610 | | AndExpression '&' EqualityExpression |
| 611 | { write_exp_elt_opcode (BINOP_BITWISE_AND); } |
| 612 | ; |
| 613 | |
| 614 | ExclusiveOrExpression: |
| 615 | AndExpression |
| 616 | | ExclusiveOrExpression '^' AndExpression |
| 617 | { write_exp_elt_opcode (BINOP_BITWISE_XOR); } |
| 618 | ; |
| 619 | InclusiveOrExpression: |
| 620 | ExclusiveOrExpression |
| 621 | | InclusiveOrExpression '|' ExclusiveOrExpression |
| 622 | { write_exp_elt_opcode (BINOP_BITWISE_IOR); } |
| 623 | ; |
| 624 | |
| 625 | ConditionalAndExpression: |
| 626 | InclusiveOrExpression |
| 627 | | ConditionalAndExpression ANDAND InclusiveOrExpression |
| 628 | { write_exp_elt_opcode (BINOP_LOGICAL_AND); } |
| 629 | ; |
| 630 | |
| 631 | ConditionalOrExpression: |
| 632 | ConditionalAndExpression |
| 633 | | ConditionalOrExpression OROR ConditionalAndExpression |
| 634 | { write_exp_elt_opcode (BINOP_LOGICAL_OR); } |
| 635 | ; |
| 636 | |
| 637 | ConditionalExpression: |
| 638 | ConditionalOrExpression |
| 639 | | ConditionalOrExpression '?' Expression ':' ConditionalExpression |
| 640 | { write_exp_elt_opcode (TERNOP_COND); } |
| 641 | ; |
| 642 | |
| 643 | AssignmentExpression: |
| 644 | ConditionalExpression |
| 645 | | Assignment |
| 646 | ; |
| 647 | |
| 648 | Assignment: |
| 649 | LeftHandSide '=' ConditionalExpression |
| 650 | { write_exp_elt_opcode (BINOP_ASSIGN); } |
| 651 | | LeftHandSide ASSIGN_MODIFY ConditionalExpression |
| 652 | { write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); |
| 653 | write_exp_elt_opcode ($2); |
| 654 | write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); } |
| 655 | ; |
| 656 | |
| 657 | LeftHandSide: |
| 658 | ForcedName |
| 659 | { push_expression_name ($1); } |
| 660 | | VARIABLE |
| 661 | /* Already written by write_dollar_variable. */ |
| 662 | | FieldAccess |
| 663 | | ArrayAccess |
| 664 | ; |
| 665 | |
| 666 | |
| 667 | Expression: |
| 668 | AssignmentExpression |
| 669 | ; |
| 670 | |
| 671 | %% |
| 672 | /* Take care of parsing a number (anything that starts with a digit). |
| 673 | Set yylval and return the token type; update lexptr. |
| 674 | LEN is the number of characters in it. */ |
| 675 | |
| 676 | /*** Needs some error checking for the float case ***/ |
| 677 | |
| 678 | static int |
| 679 | parse_number (p, len, parsed_float, putithere) |
| 680 | register char *p; |
| 681 | register int len; |
| 682 | int parsed_float; |
| 683 | YYSTYPE *putithere; |
| 684 | { |
| 685 | register ULONGEST n = 0; |
| 686 | ULONGEST limit, limit_div_base; |
| 687 | |
| 688 | register int c; |
| 689 | register int base = input_radix; |
| 690 | |
| 691 | struct type *type; |
| 692 | |
| 693 | if (parsed_float) |
| 694 | { |
| 695 | /* It's a float since it contains a point or an exponent. */ |
| 696 | char c; |
| 697 | int num = 0; /* number of tokens scanned by scanf */ |
| 698 | char saved_char = p[len]; |
| 699 | |
| 700 | p[len] = 0; /* null-terminate the token */ |
| 701 | if (sizeof (putithere->typed_val_float.dval) <= sizeof (float)) |
| 702 | num = sscanf (p, "%g%c", (float *) &putithere->typed_val_float.dval, &c); |
| 703 | else if (sizeof (putithere->typed_val_float.dval) <= sizeof (double)) |
| 704 | num = sscanf (p, "%lg%c", (double *) &putithere->typed_val_float.dval, &c); |
| 705 | else |
| 706 | { |
| 707 | #ifdef SCANF_HAS_LONG_DOUBLE |
| 708 | num = sscanf (p, "%Lg%c", &putithere->typed_val_float.dval, &c); |
| 709 | #else |
| 710 | /* Scan it into a double, then assign it to the long double. |
| 711 | This at least wins with values representable in the range |
| 712 | of doubles. */ |
| 713 | double temp; |
| 714 | num = sscanf (p, "%lg%c", &temp, &c); |
| 715 | putithere->typed_val_float.dval = temp; |
| 716 | #endif |
| 717 | } |
| 718 | p[len] = saved_char; /* restore the input stream */ |
| 719 | if (num != 1) /* check scanf found ONLY a float ... */ |
| 720 | return ERROR; |
| 721 | /* See if it has `f' or `d' suffix (float or double). */ |
| 722 | |
| 723 | c = tolower (p[len - 1]); |
| 724 | |
| 725 | if (c == 'f' || c == 'F') |
| 726 | putithere->typed_val_float.type = builtin_type_float; |
| 727 | else if (isdigit (c) || c == '.' || c == 'd' || c == 'D') |
| 728 | putithere->typed_val_float.type = builtin_type_double; |
| 729 | else |
| 730 | return ERROR; |
| 731 | |
| 732 | return FLOATING_POINT_LITERAL; |
| 733 | } |
| 734 | |
| 735 | /* Handle base-switching prefixes 0x, 0t, 0d, 0 */ |
| 736 | if (p[0] == '0') |
| 737 | switch (p[1]) |
| 738 | { |
| 739 | case 'x': |
| 740 | case 'X': |
| 741 | if (len >= 3) |
| 742 | { |
| 743 | p += 2; |
| 744 | base = 16; |
| 745 | len -= 2; |
| 746 | } |
| 747 | break; |
| 748 | |
| 749 | case 't': |
| 750 | case 'T': |
| 751 | case 'd': |
| 752 | case 'D': |
| 753 | if (len >= 3) |
| 754 | { |
| 755 | p += 2; |
| 756 | base = 10; |
| 757 | len -= 2; |
| 758 | } |
| 759 | break; |
| 760 | |
| 761 | default: |
| 762 | base = 8; |
| 763 | break; |
| 764 | } |
| 765 | |
| 766 | c = p[len-1]; |
| 767 | limit = (ULONGEST)0xffffffff; |
| 768 | if (c == 'l' || c == 'L') |
| 769 | { |
| 770 | type = java_long_type; |
| 771 | len--; |
| 772 | /* A paranoid calculation of (1<<64)-1. */ |
| 773 | limit = ((limit << 16) << 16) | limit; |
| 774 | } |
| 775 | else |
| 776 | { |
| 777 | type = java_int_type; |
| 778 | } |
| 779 | limit_div_base = limit / (ULONGEST) base; |
| 780 | |
| 781 | while (--len >= 0) |
| 782 | { |
| 783 | c = *p++; |
| 784 | if (c >= '0' && c <= '9') |
| 785 | c -= '0'; |
| 786 | else if (c >= 'A' && c <= 'Z') |
| 787 | c -= 'A' - 10; |
| 788 | else if (c >= 'a' && c <= 'z') |
| 789 | c -= 'a' - 10; |
| 790 | else |
| 791 | return ERROR; /* Char not a digit */ |
| 792 | if (c >= base) |
| 793 | return ERROR; |
| 794 | if (n > limit_div_base |
| 795 | || (n *= base) > limit - c) |
| 796 | error ("Numeric constant too large."); |
| 797 | n += c; |
| 798 | } |
| 799 | |
| 800 | putithere->typed_val_int.val = n; |
| 801 | putithere->typed_val_int.type = type; |
| 802 | return INTEGER_LITERAL; |
| 803 | } |
| 804 | |
| 805 | struct token |
| 806 | { |
| 807 | char *operator; |
| 808 | int token; |
| 809 | enum exp_opcode opcode; |
| 810 | }; |
| 811 | |
| 812 | static const struct token tokentab3[] = |
| 813 | { |
| 814 | {">>=", ASSIGN_MODIFY, BINOP_RSH}, |
| 815 | {"<<=", ASSIGN_MODIFY, BINOP_LSH} |
| 816 | }; |
| 817 | |
| 818 | static const struct token tokentab2[] = |
| 819 | { |
| 820 | {"+=", ASSIGN_MODIFY, BINOP_ADD}, |
| 821 | {"-=", ASSIGN_MODIFY, BINOP_SUB}, |
| 822 | {"*=", ASSIGN_MODIFY, BINOP_MUL}, |
| 823 | {"/=", ASSIGN_MODIFY, BINOP_DIV}, |
| 824 | {"%=", ASSIGN_MODIFY, BINOP_REM}, |
| 825 | {"|=", ASSIGN_MODIFY, BINOP_BITWISE_IOR}, |
| 826 | {"&=", ASSIGN_MODIFY, BINOP_BITWISE_AND}, |
| 827 | {"^=", ASSIGN_MODIFY, BINOP_BITWISE_XOR}, |
| 828 | {"++", INCREMENT, BINOP_END}, |
| 829 | {"--", DECREMENT, BINOP_END}, |
| 830 | {"&&", ANDAND, BINOP_END}, |
| 831 | {"||", OROR, BINOP_END}, |
| 832 | {"<<", LSH, BINOP_END}, |
| 833 | {">>", RSH, BINOP_END}, |
| 834 | {"==", EQUAL, BINOP_END}, |
| 835 | {"!=", NOTEQUAL, BINOP_END}, |
| 836 | {"<=", LEQ, BINOP_END}, |
| 837 | {">=", GEQ, BINOP_END} |
| 838 | }; |
| 839 | |
| 840 | /* Read one token, getting characters through lexptr. */ |
| 841 | |
| 842 | static int |
| 843 | yylex () |
| 844 | { |
| 845 | int c; |
| 846 | int namelen; |
| 847 | unsigned int i; |
| 848 | char *tokstart; |
| 849 | char *tokptr; |
| 850 | int tempbufindex; |
| 851 | static char *tempbuf; |
| 852 | static int tempbufsize; |
| 853 | |
| 854 | retry: |
| 855 | |
| 856 | tokstart = lexptr; |
| 857 | /* See if it is a special token of length 3. */ |
| 858 | for (i = 0; i < sizeof tokentab3 / sizeof tokentab3[0]; i++) |
| 859 | if (STREQN (tokstart, tokentab3[i].operator, 3)) |
| 860 | { |
| 861 | lexptr += 3; |
| 862 | yylval.opcode = tokentab3[i].opcode; |
| 863 | return tokentab3[i].token; |
| 864 | } |
| 865 | |
| 866 | /* See if it is a special token of length 2. */ |
| 867 | for (i = 0; i < sizeof tokentab2 / sizeof tokentab2[0]; i++) |
| 868 | if (STREQN (tokstart, tokentab2[i].operator, 2)) |
| 869 | { |
| 870 | lexptr += 2; |
| 871 | yylval.opcode = tokentab2[i].opcode; |
| 872 | return tokentab2[i].token; |
| 873 | } |
| 874 | |
| 875 | switch (c = *tokstart) |
| 876 | { |
| 877 | case 0: |
| 878 | return 0; |
| 879 | |
| 880 | case ' ': |
| 881 | case '\t': |
| 882 | case '\n': |
| 883 | lexptr++; |
| 884 | goto retry; |
| 885 | |
| 886 | case '\'': |
| 887 | /* We either have a character constant ('0' or '\177' for example) |
| 888 | or we have a quoted symbol reference ('foo(int,int)' in C++ |
| 889 | for example). */ |
| 890 | lexptr++; |
| 891 | c = *lexptr++; |
| 892 | if (c == '\\') |
| 893 | c = parse_escape (&lexptr); |
| 894 | else if (c == '\'') |
| 895 | error ("Empty character constant."); |
| 896 | |
| 897 | yylval.typed_val_int.val = c; |
| 898 | yylval.typed_val_int.type = java_char_type; |
| 899 | |
| 900 | c = *lexptr++; |
| 901 | if (c != '\'') |
| 902 | { |
| 903 | namelen = skip_quoted (tokstart) - tokstart; |
| 904 | if (namelen > 2) |
| 905 | { |
| 906 | lexptr = tokstart + namelen; |
| 907 | if (lexptr[-1] != '\'') |
| 908 | error ("Unmatched single quote."); |
| 909 | namelen -= 2; |
| 910 | tokstart++; |
| 911 | goto tryname; |
| 912 | } |
| 913 | error ("Invalid character constant."); |
| 914 | } |
| 915 | return INTEGER_LITERAL; |
| 916 | |
| 917 | case '(': |
| 918 | paren_depth++; |
| 919 | lexptr++; |
| 920 | return c; |
| 921 | |
| 922 | case ')': |
| 923 | if (paren_depth == 0) |
| 924 | return 0; |
| 925 | paren_depth--; |
| 926 | lexptr++; |
| 927 | return c; |
| 928 | |
| 929 | case ',': |
| 930 | if (comma_terminates && paren_depth == 0) |
| 931 | return 0; |
| 932 | lexptr++; |
| 933 | return c; |
| 934 | |
| 935 | case '.': |
| 936 | /* Might be a floating point number. */ |
| 937 | if (lexptr[1] < '0' || lexptr[1] > '9') |
| 938 | goto symbol; /* Nope, must be a symbol. */ |
| 939 | /* FALL THRU into number case. */ |
| 940 | |
| 941 | case '0': |
| 942 | case '1': |
| 943 | case '2': |
| 944 | case '3': |
| 945 | case '4': |
| 946 | case '5': |
| 947 | case '6': |
| 948 | case '7': |
| 949 | case '8': |
| 950 | case '9': |
| 951 | { |
| 952 | /* It's a number. */ |
| 953 | int got_dot = 0, got_e = 0, toktype; |
| 954 | register char *p = tokstart; |
| 955 | int hex = input_radix > 10; |
| 956 | |
| 957 | if (c == '0' && (p[1] == 'x' || p[1] == 'X')) |
| 958 | { |
| 959 | p += 2; |
| 960 | hex = 1; |
| 961 | } |
| 962 | else if (c == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D')) |
| 963 | { |
| 964 | p += 2; |
| 965 | hex = 0; |
| 966 | } |
| 967 | |
| 968 | for (;; ++p) |
| 969 | { |
| 970 | /* This test includes !hex because 'e' is a valid hex digit |
| 971 | and thus does not indicate a floating point number when |
| 972 | the radix is hex. */ |
| 973 | if (!hex && !got_e && (*p == 'e' || *p == 'E')) |
| 974 | got_dot = got_e = 1; |
| 975 | /* This test does not include !hex, because a '.' always indicates |
| 976 | a decimal floating point number regardless of the radix. */ |
| 977 | else if (!got_dot && *p == '.') |
| 978 | got_dot = 1; |
| 979 | else if (got_e && (p[-1] == 'e' || p[-1] == 'E') |
| 980 | && (*p == '-' || *p == '+')) |
| 981 | /* This is the sign of the exponent, not the end of the |
| 982 | number. */ |
| 983 | continue; |
| 984 | /* We will take any letters or digits. parse_number will |
| 985 | complain if past the radix, or if L or U are not final. */ |
| 986 | else if ((*p < '0' || *p > '9') |
| 987 | && ((*p < 'a' || *p > 'z') |
| 988 | && (*p < 'A' || *p > 'Z'))) |
| 989 | break; |
| 990 | } |
| 991 | toktype = parse_number (tokstart, p - tokstart, got_dot|got_e, &yylval); |
| 992 | if (toktype == ERROR) |
| 993 | { |
| 994 | char *err_copy = (char *) alloca (p - tokstart + 1); |
| 995 | |
| 996 | memcpy (err_copy, tokstart, p - tokstart); |
| 997 | err_copy[p - tokstart] = 0; |
| 998 | error ("Invalid number \"%s\".", err_copy); |
| 999 | } |
| 1000 | lexptr = p; |
| 1001 | return toktype; |
| 1002 | } |
| 1003 | |
| 1004 | case '+': |
| 1005 | case '-': |
| 1006 | case '*': |
| 1007 | case '/': |
| 1008 | case '%': |
| 1009 | case '|': |
| 1010 | case '&': |
| 1011 | case '^': |
| 1012 | case '~': |
| 1013 | case '!': |
| 1014 | case '<': |
| 1015 | case '>': |
| 1016 | case '[': |
| 1017 | case ']': |
| 1018 | case '?': |
| 1019 | case ':': |
| 1020 | case '=': |
| 1021 | case '{': |
| 1022 | case '}': |
| 1023 | symbol: |
| 1024 | lexptr++; |
| 1025 | return c; |
| 1026 | |
| 1027 | case '"': |
| 1028 | |
| 1029 | /* Build the gdb internal form of the input string in tempbuf, |
| 1030 | translating any standard C escape forms seen. Note that the |
| 1031 | buffer is null byte terminated *only* for the convenience of |
| 1032 | debugging gdb itself and printing the buffer contents when |
| 1033 | the buffer contains no embedded nulls. Gdb does not depend |
| 1034 | upon the buffer being null byte terminated, it uses the length |
| 1035 | string instead. This allows gdb to handle C strings (as well |
| 1036 | as strings in other languages) with embedded null bytes */ |
| 1037 | |
| 1038 | tokptr = ++tokstart; |
| 1039 | tempbufindex = 0; |
| 1040 | |
| 1041 | do { |
| 1042 | /* Grow the static temp buffer if necessary, including allocating |
| 1043 | the first one on demand. */ |
| 1044 | if (tempbufindex + 1 >= tempbufsize) |
| 1045 | { |
| 1046 | tempbuf = (char *) realloc (tempbuf, tempbufsize += 64); |
| 1047 | } |
| 1048 | switch (*tokptr) |
| 1049 | { |
| 1050 | case '\0': |
| 1051 | case '"': |
| 1052 | /* Do nothing, loop will terminate. */ |
| 1053 | break; |
| 1054 | case '\\': |
| 1055 | tokptr++; |
| 1056 | c = parse_escape (&tokptr); |
| 1057 | if (c == -1) |
| 1058 | { |
| 1059 | continue; |
| 1060 | } |
| 1061 | tempbuf[tempbufindex++] = c; |
| 1062 | break; |
| 1063 | default: |
| 1064 | tempbuf[tempbufindex++] = *tokptr++; |
| 1065 | break; |
| 1066 | } |
| 1067 | } while ((*tokptr != '"') && (*tokptr != '\0')); |
| 1068 | if (*tokptr++ != '"') |
| 1069 | { |
| 1070 | error ("Unterminated string in expression."); |
| 1071 | } |
| 1072 | tempbuf[tempbufindex] = '\0'; /* See note above */ |
| 1073 | yylval.sval.ptr = tempbuf; |
| 1074 | yylval.sval.length = tempbufindex; |
| 1075 | lexptr = tokptr; |
| 1076 | return (STRING_LITERAL); |
| 1077 | } |
| 1078 | |
| 1079 | if (!(c == '_' || c == '$' |
| 1080 | || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))) |
| 1081 | /* We must have come across a bad character (e.g. ';'). */ |
| 1082 | error ("Invalid character '%c' in expression.", c); |
| 1083 | |
| 1084 | /* It's a name. See how long it is. */ |
| 1085 | namelen = 0; |
| 1086 | for (c = tokstart[namelen]; |
| 1087 | (c == '_' |
| 1088 | || c == '$' |
| 1089 | || (c >= '0' && c <= '9') |
| 1090 | || (c >= 'a' && c <= 'z') |
| 1091 | || (c >= 'A' && c <= 'Z') |
| 1092 | || c == '<'); |
| 1093 | ) |
| 1094 | { |
| 1095 | if (c == '<') |
| 1096 | { |
| 1097 | int i = namelen; |
| 1098 | while (tokstart[++i] && tokstart[i] != '>'); |
| 1099 | if (tokstart[i] == '>') |
| 1100 | namelen = i; |
| 1101 | } |
| 1102 | c = tokstart[++namelen]; |
| 1103 | } |
| 1104 | |
| 1105 | /* The token "if" terminates the expression and is NOT |
| 1106 | removed from the input stream. */ |
| 1107 | if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f') |
| 1108 | { |
| 1109 | return 0; |
| 1110 | } |
| 1111 | |
| 1112 | lexptr += namelen; |
| 1113 | |
| 1114 | tryname: |
| 1115 | |
| 1116 | /* Catch specific keywords. Should be done with a data structure. */ |
| 1117 | switch (namelen) |
| 1118 | { |
| 1119 | case 7: |
| 1120 | if (STREQN (tokstart, "boolean", 7)) |
| 1121 | return BOOLEAN; |
| 1122 | break; |
| 1123 | case 6: |
| 1124 | if (STREQN (tokstart, "double", 6)) |
| 1125 | return DOUBLE; |
| 1126 | break; |
| 1127 | case 5: |
| 1128 | if (STREQN (tokstart, "short", 5)) |
| 1129 | return SHORT; |
| 1130 | if (STREQN (tokstart, "false", 5)) |
| 1131 | { |
| 1132 | yylval.lval = 0; |
| 1133 | return BOOLEAN_LITERAL; |
| 1134 | } |
| 1135 | if (STREQN (tokstart, "super", 5)) |
| 1136 | return SUPER; |
| 1137 | if (STREQN (tokstart, "float", 5)) |
| 1138 | return FLOAT; |
| 1139 | break; |
| 1140 | case 4: |
| 1141 | if (STREQN (tokstart, "long", 4)) |
| 1142 | return LONG; |
| 1143 | if (STREQN (tokstart, "byte", 4)) |
| 1144 | return BYTE; |
| 1145 | if (STREQN (tokstart, "char", 4)) |
| 1146 | return CHAR; |
| 1147 | if (STREQN (tokstart, "true", 4)) |
| 1148 | { |
| 1149 | yylval.lval = 1; |
| 1150 | return BOOLEAN_LITERAL; |
| 1151 | } |
| 1152 | if (current_language->la_language == language_cplus |
| 1153 | && STREQN (tokstart, "this", 4)) |
| 1154 | { |
| 1155 | static const char this_name[] = |
| 1156 | { CPLUS_MARKER, 't', 'h', 'i', 's', '\0' }; |
| 1157 | |
| 1158 | if (lookup_symbol (this_name, expression_context_block, |
| 1159 | VAR_NAMESPACE, (int *) NULL, |
| 1160 | (struct symtab **) NULL)) |
| 1161 | return THIS; |
| 1162 | } |
| 1163 | break; |
| 1164 | case 3: |
| 1165 | if (STREQN (tokstart, "int", 3)) |
| 1166 | return INT; |
| 1167 | if (STREQN (tokstart, "new", 3)) |
| 1168 | return NEW; |
| 1169 | break; |
| 1170 | default: |
| 1171 | break; |
| 1172 | } |
| 1173 | |
| 1174 | yylval.sval.ptr = tokstart; |
| 1175 | yylval.sval.length = namelen; |
| 1176 | |
| 1177 | if (*tokstart == '$') |
| 1178 | { |
| 1179 | write_dollar_variable (yylval.sval); |
| 1180 | return VARIABLE; |
| 1181 | } |
| 1182 | |
| 1183 | /* Input names that aren't symbols but ARE valid hex numbers, |
| 1184 | when the input radix permits them, can be names or numbers |
| 1185 | depending on the parse. Note we support radixes > 16 here. */ |
| 1186 | if (((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10) || |
| 1187 | (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10))) |
| 1188 | { |
| 1189 | YYSTYPE newlval; /* Its value is ignored. */ |
| 1190 | int hextype = parse_number (tokstart, namelen, 0, &newlval); |
| 1191 | if (hextype == INTEGER_LITERAL) |
| 1192 | return NAME_OR_INT; |
| 1193 | } |
| 1194 | return IDENTIFIER; |
| 1195 | } |
| 1196 | |
| 1197 | void |
| 1198 | yyerror (msg) |
| 1199 | char *msg; |
| 1200 | { |
| 1201 | error ("A %s in expression, near `%s'.", (msg ? msg : "error"), lexptr); |
| 1202 | } |
| 1203 | |
| 1204 | static struct type * |
| 1205 | java_type_from_name (name) |
| 1206 | struct stoken name; |
| 1207 | |
| 1208 | { |
| 1209 | char *tmp = copy_name (name); |
| 1210 | struct type *typ = java_lookup_class (tmp); |
| 1211 | if (typ == NULL || TYPE_CODE (typ) != TYPE_CODE_STRUCT) |
| 1212 | error ("No class named %s.", tmp); |
| 1213 | return typ; |
| 1214 | } |
| 1215 | |
| 1216 | /* If NAME is a valid variable name in this scope, push it and return 1. |
| 1217 | Otherwise, return 0. */ |
| 1218 | |
| 1219 | static int |
| 1220 | push_variable (name) |
| 1221 | struct stoken name; |
| 1222 | |
| 1223 | { |
| 1224 | char *tmp = copy_name (name); |
| 1225 | int is_a_field_of_this = 0; |
| 1226 | struct symbol *sym; |
| 1227 | sym = lookup_symbol (tmp, expression_context_block, VAR_NAMESPACE, |
| 1228 | &is_a_field_of_this, (struct symtab **) NULL); |
| 1229 | if (sym && SYMBOL_CLASS (sym) != LOC_TYPEDEF) |
| 1230 | { |
| 1231 | if (symbol_read_needs_frame (sym)) |
| 1232 | { |
| 1233 | if (innermost_block == 0 || |
| 1234 | contained_in (block_found, innermost_block)) |
| 1235 | innermost_block = block_found; |
| 1236 | } |
| 1237 | |
| 1238 | write_exp_elt_opcode (OP_VAR_VALUE); |
| 1239 | /* We want to use the selected frame, not another more inner frame |
| 1240 | which happens to be in the same block. */ |
| 1241 | write_exp_elt_block (NULL); |
| 1242 | write_exp_elt_sym (sym); |
| 1243 | write_exp_elt_opcode (OP_VAR_VALUE); |
| 1244 | return 1; |
| 1245 | } |
| 1246 | if (is_a_field_of_this) |
| 1247 | { |
| 1248 | /* it hangs off of `this'. Must not inadvertently convert from a |
| 1249 | method call to data ref. */ |
| 1250 | if (innermost_block == 0 || |
| 1251 | contained_in (block_found, innermost_block)) |
| 1252 | innermost_block = block_found; |
| 1253 | write_exp_elt_opcode (OP_THIS); |
| 1254 | write_exp_elt_opcode (OP_THIS); |
| 1255 | write_exp_elt_opcode (STRUCTOP_PTR); |
| 1256 | write_exp_string (name); |
| 1257 | write_exp_elt_opcode (STRUCTOP_PTR); |
| 1258 | return 1; |
| 1259 | } |
| 1260 | return 0; |
| 1261 | } |
| 1262 | |
| 1263 | /* Assuming a reference expression has been pushed, emit the |
| 1264 | STRUCTOP_STRUCT ops to access the field named NAME. If NAME is a |
| 1265 | qualified name (has '.'), generate a field access for each part. */ |
| 1266 | |
| 1267 | static void |
| 1268 | push_fieldnames (name) |
| 1269 | struct stoken name; |
| 1270 | { |
| 1271 | int i; |
| 1272 | struct stoken token; |
| 1273 | token.ptr = name.ptr; |
| 1274 | for (i = 0; ; i++) |
| 1275 | { |
| 1276 | if (i == name.length || name.ptr[i] == '.') |
| 1277 | { |
| 1278 | /* token.ptr is start of current field name. */ |
| 1279 | token.length = &name.ptr[i] - token.ptr; |
| 1280 | write_exp_elt_opcode (STRUCTOP_STRUCT); |
| 1281 | write_exp_string (token); |
| 1282 | write_exp_elt_opcode (STRUCTOP_STRUCT); |
| 1283 | token.ptr += token.length + 1; |
| 1284 | } |
| 1285 | if (i >= name.length) |
| 1286 | break; |
| 1287 | } |
| 1288 | } |
| 1289 | |
| 1290 | /* Helper routine for push_expression_name. |
| 1291 | Handle a qualified name, where DOT_INDEX is the index of the first '.' */ |
| 1292 | |
| 1293 | static void |
| 1294 | push_qualified_expression_name (name, dot_index) |
| 1295 | struct stoken name; |
| 1296 | int dot_index; |
| 1297 | { |
| 1298 | struct stoken token; |
| 1299 | char *tmp; |
| 1300 | struct type *typ; |
| 1301 | |
| 1302 | token.ptr = name.ptr; |
| 1303 | token.length = dot_index; |
| 1304 | |
| 1305 | if (push_variable (token)) |
| 1306 | { |
| 1307 | token.ptr = name.ptr + dot_index + 1; |
| 1308 | token.length = name.length - dot_index - 1; |
| 1309 | push_fieldnames (token); |
| 1310 | return; |
| 1311 | } |
| 1312 | |
| 1313 | token.ptr = name.ptr; |
| 1314 | for (;;) |
| 1315 | { |
| 1316 | token.length = dot_index; |
| 1317 | tmp = copy_name (token); |
| 1318 | typ = java_lookup_class (tmp); |
| 1319 | if (typ != NULL) |
| 1320 | { |
| 1321 | if (dot_index == name.length) |
| 1322 | { |
| 1323 | write_exp_elt_opcode(OP_TYPE); |
| 1324 | write_exp_elt_type(typ); |
| 1325 | write_exp_elt_opcode(OP_TYPE); |
| 1326 | return; |
| 1327 | } |
| 1328 | dot_index++; /* Skip '.' */ |
| 1329 | name.ptr += dot_index; |
| 1330 | name.length -= dot_index; |
| 1331 | dot_index = 0; |
| 1332 | while (dot_index < name.length && name.ptr[dot_index] != '.') |
| 1333 | dot_index++; |
| 1334 | token.ptr = name.ptr; |
| 1335 | token.length = dot_index; |
| 1336 | write_exp_elt_opcode (OP_SCOPE); |
| 1337 | write_exp_elt_type (typ); |
| 1338 | write_exp_string (token); |
| 1339 | write_exp_elt_opcode (OP_SCOPE); |
| 1340 | if (dot_index < name.length) |
| 1341 | { |
| 1342 | dot_index++; |
| 1343 | name.ptr += dot_index; |
| 1344 | name.length -= dot_index; |
| 1345 | push_fieldnames (name); |
| 1346 | } |
| 1347 | return; |
| 1348 | } |
| 1349 | else if (dot_index >= name.length) |
| 1350 | break; |
| 1351 | dot_index++; /* Skip '.' */ |
| 1352 | while (dot_index < name.length && name.ptr[dot_index] != '.') |
| 1353 | dot_index++; |
| 1354 | } |
| 1355 | error ("unknown type `%.*s'", name.length, name.ptr); |
| 1356 | } |
| 1357 | |
| 1358 | /* Handle Name in an expression (or LHS). |
| 1359 | Handle VAR, TYPE, TYPE.FIELD1....FIELDN and VAR.FIELD1....FIELDN. */ |
| 1360 | |
| 1361 | static void |
| 1362 | push_expression_name (name) |
| 1363 | struct stoken name; |
| 1364 | { |
| 1365 | char *tmp; |
| 1366 | struct type *typ; |
| 1367 | char *ptr; |
| 1368 | int i; |
| 1369 | |
| 1370 | for (i = 0; i < name.length; i++) |
| 1371 | { |
| 1372 | if (name.ptr[i] == '.') |
| 1373 | { |
| 1374 | /* It's a Qualified Expression Name. */ |
| 1375 | push_qualified_expression_name (name, i); |
| 1376 | return; |
| 1377 | } |
| 1378 | } |
| 1379 | |
| 1380 | /* It's a Simple Expression Name. */ |
| 1381 | |
| 1382 | if (push_variable (name)) |
| 1383 | return; |
| 1384 | tmp = copy_name (name); |
| 1385 | typ = java_lookup_class (tmp); |
| 1386 | if (typ != NULL) |
| 1387 | { |
| 1388 | write_exp_elt_opcode(OP_TYPE); |
| 1389 | write_exp_elt_type(typ); |
| 1390 | write_exp_elt_opcode(OP_TYPE); |
| 1391 | } |
| 1392 | else |
| 1393 | { |
| 1394 | struct minimal_symbol *msymbol; |
| 1395 | |
| 1396 | msymbol = lookup_minimal_symbol (tmp, NULL, NULL); |
| 1397 | if (msymbol != NULL) |
| 1398 | { |
| 1399 | write_exp_msymbol (msymbol, |
| 1400 | lookup_function_type (builtin_type_int), |
| 1401 | builtin_type_int); |
| 1402 | } |
| 1403 | else if (!have_full_symbols () && !have_partial_symbols ()) |
| 1404 | error ("No symbol table is loaded. Use the \"file\" command."); |
| 1405 | else |
| 1406 | error ("No symbol \"%s\" in current context.", tmp); |
| 1407 | } |
| 1408 | |
| 1409 | } |
| 1410 | |
| 1411 | |
| 1412 | /* The following two routines, copy_exp and insert_exp, aren't specific to |
| 1413 | Java, so they could go in parse.c, but their only purpose is to support |
| 1414 | the parsing kludges we use in this file, so maybe it's best to isolate |
| 1415 | them here. */ |
| 1416 | |
| 1417 | /* Copy the expression whose last element is at index ENDPOS - 1 in EXPR |
| 1418 | into a freshly malloc'ed struct expression. Its language_defn is set |
| 1419 | to null. */ |
| 1420 | static struct expression * |
| 1421 | copy_exp (expr, endpos) |
| 1422 | struct expression *expr; |
| 1423 | int endpos; |
| 1424 | { |
| 1425 | int len = length_of_subexp (expr, endpos); |
| 1426 | struct expression *new |
| 1427 | = (struct expression *) malloc (sizeof (*new) + EXP_ELEM_TO_BYTES (len)); |
| 1428 | new->nelts = len; |
| 1429 | memcpy (new->elts, expr->elts + endpos - len, EXP_ELEM_TO_BYTES (len)); |
| 1430 | new->language_defn = 0; |
| 1431 | |
| 1432 | return new; |
| 1433 | } |
| 1434 | |
| 1435 | /* Insert the expression NEW into the current expression (expout) at POS. */ |
| 1436 | static void |
| 1437 | insert_exp (pos, new) |
| 1438 | int pos; |
| 1439 | struct expression *new; |
| 1440 | { |
| 1441 | int newlen = new->nelts; |
| 1442 | |
| 1443 | /* Grow expout if necessary. In this function's only use at present, |
| 1444 | this should never be necessary. */ |
| 1445 | if (expout_ptr + newlen > expout_size) |
| 1446 | { |
| 1447 | expout_size = max (expout_size * 2, expout_ptr + newlen + 10); |
| 1448 | expout = (struct expression *) |
| 1449 | realloc ((char *) expout, (sizeof (struct expression) |
| 1450 | + EXP_ELEM_TO_BYTES (expout_size))); |
| 1451 | } |
| 1452 | |
| 1453 | { |
| 1454 | int i; |
| 1455 | |
| 1456 | for (i = expout_ptr - 1; i >= pos; i--) |
| 1457 | expout->elts[i + newlen] = expout->elts[i]; |
| 1458 | } |
| 1459 | |
| 1460 | memcpy (expout->elts + pos, new->elts, EXP_ELEM_TO_BYTES (newlen)); |
| 1461 | expout_ptr += newlen; |
| 1462 | } |